Type-writing machine.



No. 670,477. Patented Manzs, |9n|...f

w. n. Fox a a. .1. BARRETT'.

rma wm'lue mAcmuE. 7

(Application mea me. 9,` 169s.)

(No Model.)

IIIIIIHIIIIM UNTTED STATES PATENT OFFICE.

WILLIAM R. FOX AND GLENN BARRETT, OF GRAND RAPIDS, MICHIGAN.

TYPE-WRITING MACHINE.

SPECFICATION forming part of Letters Patent No. 670,477, dated March 26,1901.

Application 'filed December 9. 1899.

To wl whom it may concern,.-

Be it known that we, WILLIAM R. FOX and GLENN J. BARRETT, citizens ofthe United States, residing at Grand Rapids, Michigan, have inventedcertain new and useful Improvements in Type-Writing Machines, ofwhichthe following is a specification.

Our invention relates to type-writing Inachines, and is confined to thestructure and arrangement of the carriage-shifting and platen-feedmechanisms.

To this end the invention includes a device for th rowing out ofoperation the usual platendetentand applying a brake to the platen, soas to permit of a movement of the platen to a greater or less extentthan is permitted by the relative arrangement of the ordinaryT detentand platen-ratchet, the brake holding the platen in position when moved.

The invention further includes the mechanism Afor shifting the platenfrom lower to upper ease, this mechanism comprising a roller havingadetachable engagement with a rear bar on the platen-frame, with meansfor shifting said roller and for locking the shifting mechanism.

The invention also includes the details of construction tofbehereinafter described, and particularly pointed out in the claims.

The invention is illustrated in the accompanying drawings, in Which-Figure 1 is a detail sectional elevation of sufficient of a machine toillustrate the invention. Fig. 2 is a plan view, and Fig. 3 is a detailview.

From each side of the top;plate of the frame, forward of the track a, astud g extends upwardly, in which a rock-shaft h is journaled, centrallyof which a rodi is secured, extending upwardly and having a roller 7'journaled to the end thereof, which is normally in engagement with therear rod of the platenframe. The platen-frame is of similar constructionto that disclosed in our patent No. 614,943, granted November 29, 1898,and is similarly supported upon the front and rear links d d", so theplaten may be rocked from front to rear.

From one end of the rock-shaft h a horizontal arm n extends, which isconnected at its outer end to the shift-lever 0. On the depression ofthe shift-key the roller through Serial No. 739,823. (No model.)

this bellcrank arrangement is pressed against the rear rod of theplaten-frame, and the platen is thus rocked forwardly. In the raising ofthe platen to inspect the work, as described in the before-mentionedpatent, the rear rod m of the platen-frame is lowered and simply movesout of contact with the roller. The shiftkey has a supplemental piece ppivoted to its forward end, which carries the finger-disk. The rear endof this piece is forked and is limited in its pivotal movement by thestop-pin o', while the forward end thereof has a shoulder or projection,and b/y first depressing the key-lever through the supplemental piece bya direct downward action on the finger-key the shiftof the platen willbe effected, and then by tilting the supplemental piece by the forwardmovement of the key-disk the shoulder s will be pressed under theprojecting ledge ton the machineframe and the platen will be locked inits forward position. Y

For writing on `lined paper the ordinary line-spacing mechanism will notspace the paper to exactly correspond to the spacing of the lines. Toprovide for this in the construction of platen-operating mechanismdisclosed in the before-mentioned patent,which provides a spring-armcarrying aroller-detent engaging the platen ratchetwheel, a U- shapedframe u incloses the Vdetent-roller o, having the legs w w provided onthe extended ends of the pivot of said roller. The frame when theroller-detent is in engagement with the platen-ratchet rests upon thespring-arm y, carrying said roller in a posi.- tion parallel therewith.To disengage the roller, the frame is raised, which will bring the endof the leg w into engagement with the platen and force the roller upwardagainst the tension of the spring-arm t/,which tension serves to pressthe end of the arm w against the platen and provide a brake therefor. Anarm 2 may be extended upwardly from the carriage-frame to provide abearing'and support for the end of the leg w to prevent the twisting ofthe frame fa. When the roller is disengaged, the operator may turn theplaten lthe desired distance by means of the platen hand-wheel, and thebrake will maintain the same in the position to which it -is adjusted.When the platen is rocked forward by the de- ICO pression of the shiftor upper-case key, its movementI is arrested bythe adjustable stops c,carried by the standard d, said stops contaotingwith fthe platen-shaft.A similar stop c' arrests the movement of the carriage to the rear. Onthe release of' the shift-key the platen is returned by the springt` e,secured at one end tothe platen-frame and wound around the shaft f andsecured at its opposite end in a collar fixed thereon. The links d', towhich the links C'", carried by the platen-shaft, are secured, are iixedto each end of this shaftf.

We elaim as our invent-ionl. The combination in a type-writingr machinewith a platen, a tilting: platen-frame having a rear bar and movablesupports for said frame to permit the latter to be shifted from lower toupper ease, of a shift-key, an ar-m independent ot' said supportsadapted to be tilted by the depression of said key, and a roller Carriedby said arm engaging the rear bar of said frame, substantially asdescribed.

2. The combination in a type-Writing machine with a platen, a tiltingplaten-frame havingr a rear bar and movable supports for said frame, ofa shift-key, a bell-erank lever independent of the supporting meanshaving a Connection to the shift-key and a roller earred by one memberof said lever engaging the rear bar of the platen-frame, said barmoving),r out of engagement with said roller when the platen-frame istilted, substantially as described.

3 The combination with the platen, the platen-frame, and a ratehet-Wheecarried by the platen, of a dat spring-arm secured atene end to theplaten-frame, a roller-detent earried at the other end oi said arm, anda device carried by the springarm adapted when tilted to iind a bearingrdirectly on said platen and to litt said arm to disengage said detent,said bearing end providing a brake for said platen.

4. The combination with a platen, a platenframe, and a ratchet-wheelsecured to the platen, of a fiat spring-arm secured to the frame at oneend, a roller-detent secured to the opposite end of said spring, aU-shaped frame straddling said spring-arm and secured thereto said framehaving one ond adapted to tind a bearing directly. on said platen, and aiixed standard providing a bearing for the other end of the frame toprevent the twisting of said spring-arm, substantially as described.

In testimony whereof We affix our signatures in presence of twowitnesses.

VILLIAM R. FOX. GLENN J. BARRET". Witnesses: i

G. K. MCMULLEN, WILL. C, HOERTZ.

